strength-of-materials civil-engineering question and answers -Page 11

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Strength of Materials problems

1. Pick up the correct statement from the following :
Options
A. The point through which the resultant of the shear stresses, passes is known as shear centre
B. In the standard rolled channels, the shear centre is on the horizontal line passing through and away from the C.G. beyond web
C. In equal angles, the shear centre is on the horizontal plane and away from the C.G., outside of the leg projection
D. In T-sections, the shear centre is at the C.G. of the section
E. All the above.

2. During a tensile test on a ductile material
Options
A. nominal stress at fracture is higher than the ultimate stress
B. true stress at fracture is higher than the ultimate stress
C. true stress at fracture is the same as the ultimate stress
D. none of these.

5. A diagram which shows the variations of the axial load for all sections of the span of a beam, is called
Options
A. bending moment diagram
B. shear force diagram
C. thrust diagram
D. stress diagram
E. none of these.

6. The stress in the wall of a cylinder in a direction normal to its longitudinal axis, due to a force acting along the circumference, is known as
Options
A. yield stress
B. longitudinal stress
C. hoop stress
D. circumferential stress
E. ultimate stress.

9. Euler's formula states that the buckling load P for a column of length l, both ends hinged and whose least moment of inertia and modulus of elasticity of the material of the column are I and E respectively, is given by the relation
Options
A.
B.
C.
D.
E. P = ?El².

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